Excavator Alternators

8600390 40SI 12V 240A Alternator for School Bus A/C and Retarder Applications

Q: What numbers are documented for 8600390?

Primary Delco Remy Part Number: 8600390. Customer Part Number: DRA8600390. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 8600390 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

1 product photo · Swipe on mobile, or hover and select a thumbnail.

OEM / reference8600390

Specification40SI 12V 240A Brushless Alternator

Catalog ID78045372

Delco Remy's official product record identifies 8600390 as an active 40SI 12V 240A brushless alternator with J180 long-hinge mounting, remote sense and negative ground. Delco Remy's school-bus guide lists 8600390 for buses with factory air conditioning or an electromagnetic brake retarder after 2002. The exact EexcavaStart product views match the 8600390 source folder. Confirm the complete number, mounting, pulley, terminals and vehicle electrical configuration before ordering.

Product Type: 40SI new brushless alternator
System Voltage: 12V
Rated Output: 240A
Mount Type: J180 long hinge
B+ Output Terminal: 5/16 in
R Terminal: #10
I Terminal: #10
Remote Sense: Yes
Ground / Polarity: Negative

Send email inquiry Ask on WhatsApp Return to catalog

Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Part-number relationships

Relationship	Reference family	Number
Primary Delco Remy Part Number	Official 40SI new alternator identity	8600390
Customer Part Number	Official Delco Remy cross-reference record	DRA8600390

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

8600390

Other documented relationship

DRA8600390

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

40SI 12V 240A Brushless Alternator

Category: Excavator Alternators
Catalog ID: 78045372
Photo views: 1

Before ordering

Confirm these details

Confirm voltage and rated amperage against the original alternator label.
Compare mounting ears, pulley type and pulley-groove count.
Check plug shape, terminal position and regulator connection.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

2 model references

Official application class: School buses with factory air conditioning or an electromagnetic brake retarder after 2002
Fitment limitation: Confirm 8600390, J180 long-hinge mounting, terminals, pulley and vehicle electrical configuration

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 8600390

Which machines use 8600390?

Recorded compatible model references include Official application class: School buses with factory air conditioning or an electromagnetic brake retarder after 2002, Fitment limitation: Confirm 8600390, J180 long-hinge mounting, terminals, pulley and vehicle electrical configuration. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 8600390?

No alternate number is listed for 8600390. Send the original nameplate for an alternate-number check.

How do I confirm 8600390 before ordering?

Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.

Continue comparing verified references from the same system.

Browse this category